Most of JUnit tests of OLM module need to be reviewed, and largely redone because:
- their relevance is higly questionable from a business point of view
- lots of redundancy (several tests test more or less nothing, or the same thing, while in different places...)
- majority of them instanciate lots of dependent objects (with lots of writing in datastore what makes JUnit test execution being rather long) instead of mocking them
- maintenance of this module becomes very difficult